Effects of contact with treatment users on mental illness stigma: Evidence from university roommate assignments

► Uses a quasi-experimental design based on assignment of university roommates, which avoids self-selection bias. ► Living with a roommate with a history of mental health treatment caused an increase in reported stigma. ► Effect did not occur, however, among students with a prior treatment history of their own. ► the importance of isolating additional components necessary to reduce stigma in contact-based interventions.